Cool, I got all the collectibles and won! Couple things -- it would be nice if the fact that you're a die had some effect on the game's design because really all these objects could be just normal cubes and it wouldn't make a difference on the design. Also, the camera gets a little hard to use because the mouse reaches the edge of the screen -- normally I think the way that games do cameras is they move the mouse back to the center of the screen each frame (and make it invisible).
But it looks pretty nice, especially the initial tutorial area with the floating text.